Sexual move which involves expanding the partners asshole to the point you can fit your penis and one testicle in at the same time. It was given the name "Chevron" because the penis laying over the testicle is similar to a gas pump.

Guy1, "I had this girl bent over and her asshole was so wide I snuck a nut inside."
Guy2, "You need to be careful when doing the chevron. If she clenches up, you might get stuck."